05B Chain Sprockets

05B Chain Sprockets

Size 05B chain is the third smallest British Standard roller chain made. Because of this, high-precision tolerances are necessary not only for manufacturing the chain but manufacturing the sprockets as well. Our sprockets are made with these high-precision tolerances using state of the art modern equipment, they are also constructed out of a high-quality high-strength steel so not only are the 05B sprockets effectively high-performance, they also out-last other brands. Standard configurations for these sprockets include A-Plate and B-Hub (hub on one side), while stock bores will range from 5mm up to 20mm and outside diameters range from 24mm to 322.5mm. We also supply finished bore/ bore to size sprockets from our in-house machine shop. To get a quote or for additional information please contact us and we'll be happy to assist you.

05B A-plate Sprockets


Sprocket Size
Tooth Count
Outside Diameter (OD)
Pitch Diameter (PD)
Stock Bore (ID)
Thickness (T)
Weight (kg)
05A8 8 24.0mm 20.90mm 6mm 2.8mm 0.006
05A9 9 26.6mm 23.39mm 6mm 2.8mm 0.007
05A10 10 29.2mm 25.89mm 8mm 2.8mm 0.009
05A11 11 31.7mm 28.39mm 8mm 2.8mm 0.011
05A12 12 34.2mm 30.91mm 8mm 2.8mm 0.010
05A13 13 36.7mm 33.42mm 8mm 2.8mm 0.018
05A14 14 39.2mm 35.95mm 8mm 2.8mm 0.019
05A15 15 41.7mm 38.48mm 8mm 2.8mm 0.024
05A16 16 44.3mm 41.01mm 8mm 2.8mm 0.024
05A17 17 46.8mm 43.53mm 8mm 2.8mm 0.025
05A18 18 49.3mm 46.07mm 8mm 2.8mm 0.026
05A19 19 51.9mm 48.61mm 8mm 2.8mm 0.031
05A20 20 54.4mm 51.14mm 8mm 2.8mm 0.038
05A21 21 57.0mm 53.67mm 8mm 2.8mm 0.040
05A22 22 59.5mm 56.21mm 8mm 2.8mm 0.045
05A23 23 62.0mm 58.75mm 8mm 2.8mm 0.050
05A24 24 64.6mm 61.29mm 8mm 2.8mm 0.060
05A25 25 67.5mm 63.83mm 8mm 2.8mm 0.066
05A26 26 69.5mm 66.37mm 10mm 2.8mm 0.068
05A27 27 72.2mm 68.91mm 10mm 2.8mm 0.076
05A28 28 74.8mm 71.45mm 10mm 2.8mm 0.080
05A29 29 77.3mm 73.99mm 10mm 2.8mm 0.085
05A30 30 79.8mm 76.53mm 10mm 2.8mm 0.087
05A31 31 82.4mm 79.08mm 10mm 2.8mm 0.090
05A32 32 84.9mm 81.61mm 10mm 2.8mm 0.093
05A33 33 87.5mm 84.16mm 10mm 2.8mm 0.108
05A34 34 90.0mm 86.70mm 10mm 2.8mm 0.120
05A35 35 92.5mm 89.24mm 10mm 2.8mm 0.125
05A36 36 95.0mm 91.79mm 10mm 2.8mm 0.130
05A37 37 97.6mm 94.33mm 10mm 2.8mm 0.145
05A38 38 100.2mm 96.88mm 10mm 2.8mm 0.160
05A39 39 102.7mm 99.42mm 10mm 2.8mm 0.180
05A40 40 105.2mm 101.97mm 10mm 2.8mm 0.200
05A41 41 107.8mm 104.51mm 12mm 2.8mm 0.170
05A42 42 110.4mm 107.05mm 12mm 2.8mm 0.185
05A43 43 112.9mm 109.60mm 12mm 2.8mm 0.200
05A44 44 115.5mm 112.14mm 14mm 2.8mm 0.210
05A45 45 118.0mm 114.69mm 12mm 2.8mm 0.220
05A46 46 120.6mm 117.23mm 12mm 2.8mm 0.240
05A47 47 123.1mm 119.77mm 12mm 2.8mm 0.251
05A48 48 125.6mm 122.32mm 12mm 2.8mm 0.270
05A49 49 128.2mm 124.86mm 12mm 2.8mm 0.320
05A50 50 130.7mm 127.41mm 12mm 2.8mm 0.340
05A51 51 133.3mm 129.95mm 14mm 2.8mm 0.380
05A52 52 135.8mm 132.49mm 14mm 2.8mm 0.360
05A53 53 138.4mm 135.04mm 14mm 2.8mm 0.375
05A54 54 140.9mm 137.59mm 14mm 2.8mm 0.385
05A55 55 143.5mm 140.13mm 14mm 2.8mm 0.400
05A56 56 146.0mm 142.68mm 14mm 2.8mm 0.425
05A57 57 148.6mm 145.22mm 14mm 2.8mm 0.450
05A58 58 151.0mm 147.77mm 14mm 2.8mm 0.465
05A59 59 153.6mm 150.31mm 14mm 2.8mm 0.490
05A60 60 156.2mm 152.85mm 14mm 2.8mm 0.500
05A62 62 162.0mm 157.95mm 16mm 2.8mm 0.520
05A64 64 167.1mm 163.04mm 16mm 2.8mm 0.550
05A65 65 169.2mm 165.58mm 16mm 2.8mm 0.620
05A66 66 172.2mm 168.13mm 16mm 2.8mm 0.650
05A68 68 177.3mm 173.22mm 16mm 2.8mm 0.680
05A70 70 182.4mm 178.31mm 20mm 2.8mm 0.730
05A72 72 187.5mm 183.41mm 20mm 2.8mm 0.800
05A75 75 195.1mm 191.04mm 20mm 2.8mm 0.820
05A76 76 197.7mm 193.59mm 20mm 2.8mm 0.850
05A78 78 202.8mm 198.68mm 20mm 2.8mm 0.870
05A80 80 207.9mm 203.77mm 20mm 2.8mm 0.800
005A85 85 220.6mm 216.50mm 20mm 2.8mm 1.070
05A90 90 233.4mm 229.23mm 20mm 2.8mm 1.210
05A95 95 246.1mm 241.96mm 20mm 2.8mm 1.325
05A100 100 258.9mm 254.68mm 20mm 2.8mm 1.535
05A110 110 284.3mm 280.15mm 20mm 2.8mm 1.600
05A114 114 294.5mm 290.33mm 20mm 2.8mm 1.700
05A120 120 310.0mm 305.61mm 20mm 2.8mm 1.800
05A125 125 322.5mm 318.34mm 20mm 2.8mm 1.900


05B B-Hub Sprockets


Sprocket Size
Outside Diameter (OD)
Pitch Diameter (PD)
Hub Diameter (H)
Stock Bore (ID)
Length Thru Bore (L)
Thickness (T)
Weight (kg)
05B8 24.0mm 20.90mm 13mm 6mm 12mm 2.8mm 0.02
05B9 26.6mm 23.39mm 15mm 6mm 12mm 2.8mm 0.02
05B10 29.2mm 25.89mm 17mm 8mm 12mm 2.8mm 0.02
05B11 31.7mm 28.39mm 18mm 8mm 13mm 2.8mm 0.03
05B12 34.2mm 30.91mm 20mm 8mm 13mm 2.8mm 0.03
05B13 36.7mm 33.42mm 23mm 8mm 13mm 2.8mm 0.05
05B14 39.2mm 35.95mm 25mm 8mm 13mm 2.8mm 0.05
05B15 41.7mm 38.48mm 28mm 8mm 13mm 2.8mm 0.07
05B16 44.3mm 41.01mm 30mm 8mm 14mm 2.8mm 0.08
05B17 46.8mm 43.53mm 30mm 8mm 14mm 2.8mm 0.08
05B18 49.3mm 46.07mm 30mm 8mm 14mm 2.8mm 0.09
05B19 51.9mm 48.61mm 30mm 8mm 14mm 2.8mm 0.09
05B20 54.4mm 51.14mm 30mm 8mm 14mm 2.8mm 0.10
05B21 57.0mm 53.67mm 35mm 8mm 14mm 2.8mm 0.12
05B22 59.5mm 56.21mm 35mm 8mm 14mm 2.8mm 0.13
05B23 62.0mm 58.75mm 35mm 8mm 14mm 2.8mm 0.14
05B24 64.6mm 61.29mm 35mm 8mm 14mm 2.8mm 0.14
05B25 67.5mm 63.83mm 35mm 8mm 14mm 2.8mm 0.14
05B26 69.5mm 66.37mm 40mm 10mm 16mm 2.8mm 0.14
05B27 72.2mm 68.91mm 40mm 10mm 16mm 2.8mm 0.20
05B28 74.8mm 71.45mm 40mm 10mm 16mm 2.8mm 0.21
05B29 77.3mm 73.99mm 40mm 10mm 16mm 2.8mm 0.21
05B30 79.8mm 76.53mm 40mm 10mm 16mm 2.8mm 0.22
05B31 82.4mm 79.08mm 40mm 10mm 16mm 2.8mm 0.22
05B32 84.9mm 81.61mm 40mm 10mm 16mm 2.8mm 0.24
05B33 87.5mm 84.16mm 40mm 10mm 16mm 2.8mm 0.24
05B34 90.0mm 86.70mm 40mm 10mm 16mm 2.8mm 0.24
05B35 92.5mm 89.24mm 40mm 10mm 16mm 2.8mm 0.24
05B36 95.0mm 91.79mm 40mm 10mm 16mm 2.8mm 0.24
05B37 97.6mm 94.33mm 40mm 10mm 16mm 2.8mm 0.24
05B38 100.2mm 96.88mm 40mm 10mm 16mm 2.8mm 0.28
05B39 102.7mm 99.42mm 40mm 10mm 16mm 2.8mm 0.28
05B40 105.3mm 101.97mm 40mm 10mm 16mm 2.8mm 0.28
05B45 118.0mm 114.69mm 60mm 12mm 20mm 2.8mm 0.88
05B50 130.7mm 127.41mm 60mm 12mm 20mm 2.8mm 0.88
05B57 146.8mm 145.22mm 80mm 14mm 20mm 2.8mm 1.20